Carl coerper



(No Model.)

C. GOERPER.

REFLECTOR-FOR ARC LAMPS. 4

Patented Feb. 19, 1895.

a II 0 NITED STATES PATENT FFICEQ CARL OOERPER, or COLOGNE, GERMANY.

REFLECTOR FOR ARC LAMPS.

SPECIFICATION forming part of Letters Patent No. 534,424, dated February19, 1895.

Application filed May 15, 1894.

I To all whom it may cohoern:

Be it known that I, CARL COERPER, a citizen of the German Empire, and aresident of Cologne, Germany,have invented certain new and usefulImprovements in Reflectors for Arc Lamps, of which the following isaspecification.

In electric arc-lamps, and especially those in which thealternating-current is used, it is possible to obtain a favorableillumination only when the reflector is arranged immediately above thearc. With the ordinary lamp-- globes, the reflector can have butcomparatively small dimensions, for the reason that the size of the samehas to be smaller than the mouth of the globe. The small size of thereflector diminishes the effect of the same, however, very considerably.

It is the object of the present invention to furnish an improvedreflector of larger size than heretofore, so that the light of the arccan be diffused in a more efiective manner.

The invention consists to these ends of a reflector for arc-lampscomposed of an inner central reflector which may be introduced throughthe mouth of the globe and supported therein by means of the supportingrods of the carbons, and having an outer auxiliary sectional reflectorof annular form which surrounds the central reflector, such auxiliaryreflector being supported within the globe by any suitable means.

In the accompanying drawings,-Figure 1 is a vertical transverse sectionof the same on line 1, 1, Fig. 2. Fig. 2 is a plan-view of an electricarc-lamp, partly in section on line 2, 2, Fig. 1, and provided with myimproved re-- flector.

Similar letters of reference indicate corresponding parts.

In the drawings, a, a, are-the supportingrods 0, the lamp-globe and athe carbons Serial No. 511,303. (No model.)

been reflected below the horizontal plane by the small reflector b, thereflector is enlarged by supporting in any suitable manner around thesame an annular auxiliary reflector d which is like the reflector 12,arranged within the glass-globe and is composed of several parts,preferably two, as shown.

In the present instance, the auxiliary reflector d is attached to theglobe-by means of hangers e,which are supported from the topcasingtabove the lamp-globe 0, through the medium of the hangers e with whichthe rim of the globe may be engaged. The auxiliary reflector is alwaysarranged within the globe in such a position that it forms in combination with the central small reflector b a substantially uniformreflecting surface. In this manner it is possible to employ in electricarc-lamps larger reflectors than heretoforeimmediately above or on alevel with the are without necessitatingthe changing of the ordinaryglass-globes, and thereby .the augmentation of the diffusion of thelight is very considerable, particularly with alternating currentarc-lamps.

It is evident without particular explanation that the sectionalconstruction of the auxiliary annular reflector (2 enables theintroduction of the same through the mouth of theglobe, which would beimpossible were the same made integral.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- In an electric arc-lamp, the combination, with acentral main-reflector supported within the globe by the supporting-rodsof the carbons, of an annular'auxiliary sectional-re flector surroundingthe central reflector and being located within the globe of the lamp,substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

CARL OOERPER.

Witnesses:

FRITZ Scnnoonn, F. KAMMSSEN.

